ERN ReCONNET is the European Reference Network on Rare and Complex Connective Tissue and Musculoskeletal Diseases. These include hereditary conditions, and systemic autoimmune diseases such as systemic sclerosis, mixed connective tissue diseases, inflammatory idiopathic myopathies, undifferentiated connective tissue diseases, and anti-phospholipid syndrome. ERN ReCONNET aims to improve online training and education, thanks to several webinars and videos.